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Which of the following equations can be used to solve for the radius

Which of the following equations can be used to solve for the radius-example-1
User Lama
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2 Answers

5 votes
Choice 4 is correct ... r = the square root of area over pi
User Ayaz Pasha
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4 votes
Transpose the equation so that r is a function of A.

r = sqrt(A/pi)
User Tim Bull
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